کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6409672 | 1629912 | 2016 | 6 صفحه PDF | دانلود رایگان |

- Revised, corrected analytical solutions for oscillatory pumping tests are provided.
- Phase wrapping may impact both analytical and numerical analysis approaches.
- Strategies for avoiding errors in oscillatory testing results are provided.
Oscillatory pumping tests have recently seen a resurgence in interest as a strategy for aquifer characterization. In a cross-well pumping test, measured responses to oscillatory pumping tests consist of the amplitude and phase delay of pressure changes at an observation well. This information can be used to obtain estimates of effective aquifer parameters (conductivity and storage coefficients), by fitting field data with an analytical model through parameter estimation. Alternately, multiple pumping tests can be fit simultaneously through tomographic analyses. However, in both cases, analysis of obtained test results may be ambiguous if “phase wrapping” occurs, i.e. if signals are delayed by more than one period. In this work, we demonstrate scenarios under which phase wrapping can make analysis of oscillatory testing difficult, and present guidelines for avoiding ambiguity in oscillatory testing results.
Journal: Journal of Hydrology - Volume 540, September 2016, Pages 1016-1021